Apparatus for making cord and the like



APril 15, l947- A. H. BURKHOLDER ETAL 2,419,G55

APPARATUS FOR MAKING CORD AND THE LIKE Filed )lay 1, 1944 2 Sheets-Shoot 1 IHVENTOR Alden H. Burzholder Kanar/r Nl MQ allan. Gzorgc P. J taf.: Icy

lApril 15, 1947.

A. H. BURKHOLDER Er AL 2,419,55

NGv CORD AND THB LIKE 2 Sheets-Sheet 2 APPARATUS Foa um 'Filed Hay 1, 1944 Patented Apr. 1s,v 1941 l APrAaArUs Fon MAKING conn AND 'rnc LIKE Alden H. .Burkholden Cleveland, George P.

Standley, Cleveland McLellan, Cleveland,

trial Rayon Corporation,

poration of Delaware Heights, and Kenneth M.

Ohio, assignors to Indus- Cleveland, Ohio, a cor- Appucanon May 1,194.4, serial No. 533,502

1 claim. l

This invention relates to the manufacture of cord or cordlike products and its provides an apparatus by which such products may be advantageously produced.

Cord and cordlike materials derived from re1- atively heavy denier yarns, for example, yarns having a denier in excess of about 1,000 are commonly prepared by ring twisting.V In'producing such cord products, the yarn is given a ply twist of a desired number of turns per inch. Two or more of the resulting twisted strands are then twisted together in the opposite direction a desired number of turns per inch forming what is known as a cord twist. The use of ring twisters in manufacturing such products, however, subjects the yarn to considerable abrasive wear with the lresult that the yarn is often` substantially weakened by the twisting operation. In addition, ring twisting is performed at relatively low speeds and with relatively small yarn packages.

Uptwisting, on the other hand, may be performedl at substantially higher speeds and with substantially larger packages. Furthermore, in uptwisting, the yarn is not in general subjected to as much adverse abrasive action or wear as in the ordinary ring twister. However, attempts to make cord products from relatively heavy denier yarn by uptwisting have involved considerable difficulties.

As an example, in ply-twisting heavy denier yarns by the ordinary uptwisting methods, the twist given the yarn being withdrawn from the supply i package frequently becomes ensnarled with th'e yarn remaining on the package. This often results in breaking of some of the strands of the yarn or sometimes in a complete break of the yarn itself.- Naturally, this will result in a weakened cord product. vDifliculty is also encountered when two or more strands oi the ply-twisted yam are gathered upon a collecting spool. The twisted strands should be collected in parallel fashion in such a manner that equallengths of the strands are wound upon the collecting spool since this spool, in turn, is used as the supply package in the cord-twisting operation.

This invention provides an apparatus for uptwisting heavy denier yarns to produce cord or cordlike materials in which the foregoing dithculties are obviated. The cord produced is remarkably uniform in the degree of twist imparted thereto and in consequence has improved fatigue resistance and more uniform strength characteristics. Such cord may be used with particular advantage in the construction of rub- (Cl. 57--62)` n 2 ber tires although it may also be used for other purposes.

In accordance with this invention, cord or cord- .like materials are produced by uptwisting heavy denier yarns having an initial twist, these yarns being subjected to a ply-twisting operation which is performed in such a manner as to prevent the twist, which is being imparted to the yarn, from running back to the supply package; two or more strands of ply-twisted yarn are then wound in parallel fashion upon a suitable collecting package from which they are withdrawn and uptwisted in a direction opposite to th'e ply twist tc produce the iinished cord product.

By ply-twisting a yarn having an initial degree of twist, it has been found that the ensnarling of yarn being withdrawn from the supply package with the yarn remaining on the package can be considerably minimized. The amount of such twist may vary from about one half to about 4.5 turns per inch and, in general, it is particularly advantageous to have the twist in excess oi one turn per inch.

It further has been found that the additional twist from running back to the yarn on the supply package also minimized ensnarling of the yarn being withdrawn with the yarn remaining on the supply package. The twist advantageously may be prevented from running back by restraining it to a deiinite zone as by using a suitable flier, such as that to be hereinafter described.

The invention will be more fully described 'by reference to the accompanying drawings in which:

Figure 1 is a sectional elevation of an uptwisting apparatus;

Figure 2 illustrates the convergence of two ply-twisted strands into substantially parallel relationship;

Figures 3 and 4 are plan and elevation views of a iiier suitable for practising the invention;

Fig. 5 is an elevation partly in section along the line 5--5 of Figure 1; and

Figure 6 is an elevation partly in section taken along line 6-6 of Figure l. v

f In the drawings, the frame structure i@ is provided with a transverse rail li mounted on angular frame supports l2. Aplurality of. yarn supply packages I3 and H3A containing yarn having an initial twist is mounted on spindles it which are supported by the transverse rail il. Each spindle is provided with a pulley and brake arrangement generally shown at it to enable the operator to stop and start the rotation oi bobbins prevention of mounted upon the spindle. The spindles are rotated by means o1' belts I'I which, in turn, are actuated by a suitable source of power (not shown). Separating shields I8 are provided between some of the supply packages.

The yarn I4 from each rotating bobbin is withdrawn at substantially the'same rate, traveling through eye 30 of flier arm 28, being part of iiier I9 rotatably mounted at the top of each bobbin,

and on the extensions of protruding spindles I5. I'he yarn is then led through a pigtal guide 20,

fixed to the transversely positioned angular supporting bar 2|; thence, through another pigtall converging guide 22 and an open-slotted guide 22A, both ilxed to a laterally traversing bar 23 which, through its lateral motion, spreads the grouped substantially parallel plied yarns evenly over the core of the horizontally positioned rotating bobbin 24. The yarns I4 from companion bobbins I3 and ISA are grouped or collected through converging guide 22 into a substantially parallel relation as shown in Figure 2 and in this condition are wound on the collectingbobbin 24 to be later twisted oppositely into cord on the upper deck. The traverse bar 23 moves laterally in supporting members 25 fixed to the angular support 2I which is fastened to frame Iii. The collecting bobbins 24 rotate in suitable bracket bearings generally designated at 26 and are actuated by rotating take-up drums 21 upon which the bobbins substantially ride. The speeds of the supply bobbins I3 and I3A and of collecting bobbins 24 are correlated in order that the correct amount of twist is given to each yarn.

One suitable means for preventing twist which is imparted to .the yarn I 4 from running back to the yarn on the supply packages I3 or I 3A is a ilier such as that illustrated by Figures 3 and 4. 'Ihe iiier I9 has an eye 30 thro-ugh which the yarn passes. This eye is positioned substantially vertically and inthe plane of its arm 28 when the nier is mounted on the spindle I5. As a result, the yarn in passing through this eye will be subjected to sulilcient frictional resistance so that the twist imparted to the yarn will be substantially prevented from traveling back through the eye 30 to the yarn on the supply packages I3 or I3A.

The arm 28 of the flier which is mounted on the body portion 3| is counterbalanced by a substantially vertical vane 29 also mounted on the body portion 3l. As the ier is beingrotated, the vanellke arm 29, due to the wind resistance which it causes, will tend to retard the rotation of the iier and I4 in frictional engagement with the ilier eye 30. It thus serves to aid in preventing the twist which is being imparted to the yarn I4 frofn traveling back beyond the eye 30 to the yarn on the supply package.

Since the frictional engagement of the yarn with eye 30 prevents the twist from backing up to the bobbins, the deleterious effects which would be encountered due to backing up of the twist are eliminated. In addition, the uniformity of twist lr.- turns per inch is improved for substantially all twisting takes place away from the bobbins and in a. defined zone between the eyes of the fliers and guides 20 which distance remains substantially constant, whereas in conventional twisters the twisting takes place throughout the variable distance between the point where the yarn leaves the bobbin and a xed guide.

Referring t Figures 1 and 6, after collecting bobbins 24 are substantially full they are taken further serve to keep the yarn 4 o and placed on spindles 33 positioned on the second deck of the twisting machine. The spindles are mounted in the same manner as described with reference to spindles I5, on a transverse bar 34 and havesimilar pulley-brake mounting arrangements 35, as at I6, and operated in a likel but opposite direction by belts 3B. From bobbin 24 the twisted yarn strands are conducted through pigtail guides 38, fixed to the transverse bar 39; then through an open porcelain guide 4I, xed on the laterally traversing bar 42 whose lateral motion evenly distributes the twisted cord on collecting spools or bobbins 43, frictionally rotated by take-up drums 45.

Each bobbin or collecting package 24 rotates within a. balloon-restricting cylinder 31. The twist imparted to the parallel strands which are being withdrawn from the package 24 in this operation desirably travels back to the yarn package itself in contradlstinction to the twisting operation performed in imparting the ply twist to the individual strands. Having the twist take place on the package prevents the possible separation of the parallel yarns due to centrifugal force and prevents any corkscrew eflect from being imparted to the cord.

It has been found that, apparently due to the relatively high speed oi' rotation of the bobbins 24 containing the parallel strands of ply-twisted yarn, the free ends of the yarn rst collected on this bobbin may interfere with the proper withdrawal of the parallel strands therefrom. Diiculties are sometimes encountered due to ensnarling of the parallel strands with free ends which, due apparently to centrifugal action project out stantially all of the yarn has been withdrawn therefrom. This protrusion of free ends frequently causes the loss of the last few turns of yarn on the bobbin. To obviate this diiliculty, it is important to secure the free ends of the parallel strands to the core of the collecting bobbin 24 as shown, for example, at 50 in Figure l. As there shown, the parallel strands of twisted yarn have their ends secured to the core of the free ends of the strands on the bobbin.

It is also important to insure strands passing therethrough and preferably of a slightly arcuate construction so as to nest" the yarn going therethrough to the collecting package.

'I'he invention will Example ing an initial I 'acteristlcs and arer placed upon the spindles i5. After threading the ends o1 the yarn through the flier eyes .I0 and the guides 20, 22 and 22A, the ends of the yarn are secured ina parallel relation by.

means of adhesive tape .to the core of the lcolspeed such as to give a nal total twist oi y14 turns per inch tothe yarn. Due to the action of the ilier Il, vthe twisting 'of' theyarn will occur between theier eyev 30 and the`r guide 20 with substantially no twist running back beyond lthe eye 3l to the supply packages I3for 13A.

when the collecting bobbm 24 is ruled. the bob-' bin is transferred to the upper deck of the appa.- ratus and after threading the yarn through the various guides `and securing it to thecollecting spool V y nal twist of 11.5 turns per inch, in a direction 43, the bobbinsare rotated'toimpart a opposite tothe additional 12.6 turns per inch, given the individual yarns.- Th'e ilnished cord lecting bobbin 24. The bobbins are rotated at a s for mounting said collecting package, means for rotating said collecting package in an opposite direction for imparting a ply twist to the col lected yarn. a cylinder surrounding said rotat- 'ing package for substantially restraining the bal-1l looning of the collected up-twisted yarn, an axially disposed guide above said collecting package. lthe twisting off said collected yarn occurring i substantiallybetween'sald guide andthe yarn l.take-off point on said collecting package, a pm Y ripherally driven take-up package for said up product will beremarkably uniform in twist char other physical properties.

Instead of imparting a total ply twist of 14 turns per inch, as indicated in theVv preceding example, total twists ranging from 1l to 18 turns per inch may be used. Similarly, need not be 11.5 turns per inch but may range from 11 to 13 turns per. inch.

We claim: l

An up-twisting apparatus comprising a struc ture having at leasttwo decks, a lower deck and will have excellent strengthand4 ,as n' 5 the cable twistl s and upper deck, at least two spindles on said lower Q deck adapted to hold yam supply packages, means for simultaneously rotating said packagesatidentical speeds, filers 'for frictionally yengagingy the yarns as they vare withdrawn from 'said Asupply packages, said fliers beinglposltloned on said spindles above said supply packagesand'being adapted to substantially prevent the-twist irnparted to said yarns from backing upfto the supply packages, yarn guides axially disposed above said supply packages, said yarn guides and said iers determining the twistlngzone' of the yarns from said supply packages, a traverse bar above said supply packages, a guide on said 'traverse'bar being adapted to collect said .sep"

arately simultaneously up-twisted yarns, a traville vof ,thispatentz K UNITED STATES P ATENTS yNumber Name l Date 1,36'1 f Pratt --1..- Oct. 12, 1839 1,193,041 Manauccheili.`...'...... Aug. 1, 1916 1,611,166 Daniloif Dec. 21, 1926 2,064,270 -Rowe --.a Dec. 15,1936 2,116,543 'Schautz et al. a'... May l0, 1938 1,260,212 Kuoer1i en -Mar. 1e, 191s 2,021,401 Bochm'an'n Nov. 19. 1,935 f 1,862,162 Rowe v..` June '7, 1932r- 927,343 De Ferranti July 7, 1909 A2,004,270 Rowe Dec.' l5, 1936 l FOREIGN PATENTS Number v f Country Date 115,498 British Mayi, 1918 twisted yarn, a traverse-bar above said collected yarn package, and a ,traversing guide on said traverse .bar for directing the winding of the rip-twisted yarn on said take-up package. ALDEN H. BURKHOLDER.

n i GEORGE P. STANDLEY. KENNETH lili.'lucLltIlLrAll l assumons man A The following references areY of recordl in the 

